Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4106
Number of amino acids:422
Molecular Weight:43607.43 Da
Theoretical pI:5.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4610.9%
Cysteine CYS (C)10.24%
Glutamic Acid GLU (E)184.27%
Aspartic Acid ASP (D)163.79%
Glycine GLY (G)276.4%
Phynylalanine PHE (F)143.32%
Isoleucine ILE (I)163.79%
Histidine HIS (H)71.66%
Lysine LYS (K)235.45%
Methionine MET (M)20.47%
Leucine LEU (L)5011.85%
Asparagine ASN (N)214.98%
Glutamine GLN (Q)61.42%
Proline PRO (P)348.06%
Serine SER (S)4911.61%
Arginine ARG (R)40.95%
Threonine THR (T)4510.66%
Tryptophan TRP (W)00%
Valine VAL (V)337.82%
Tyrosine TYR (Y)102.37%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1951
HydrogenH3126
NitrogenN498
OxygenO622
SulphurS3

FormulaC1951H3126N498O622S3
Total Number of Atoms:6200


Total number of positively charged residues (ARG + LYS):27
Total number of negatively charged residues (ASP + GLU):34
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14900
Absorption 0.1% (=1 g/l)    0.342,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14900
Absorption 0.1% (=1 g/l)    0.342,   assuming all CYS residues are reduced
Aromaticity:0.057

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.92

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.15, 31.04, 27.49]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:94.5733
Grand average of hydropathicity (GRAVY):0.09